CN103383903A - Dry-burning-resistant temperature-sensitive switch for electric heating device - Google Patents

Dry-burning-resistant temperature-sensitive switch for electric heating device Download PDF

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Publication number
CN103383903A
CN103383903A CN2013103017156A CN201310301715A CN103383903A CN 103383903 A CN103383903 A CN 103383903A CN 2013103017156 A CN2013103017156 A CN 2013103017156A CN 201310301715 A CN201310301715 A CN 201310301715A CN 103383903 A CN103383903 A CN 103383903A
Authority
CN
China
Prior art keywords
casing
binding post
sensitive switch
temperature
bimetal leaf
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2013103017156A
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Chinese (zh)
Inventor
马永红
郑劝文
卢子忧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dongguan Kain Electronic Science & Technology Co Ltd
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Dongguan Kain Electronic Science & Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dongguan Kain Electronic Science & Technology Co Ltd filed Critical Dongguan Kain Electronic Science & Technology Co Ltd
Priority to CN2013103017156A priority Critical patent/CN103383903A/en
Publication of CN103383903A publication Critical patent/CN103383903A/en
Pending legal-status Critical Current

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Abstract

A dry-burning-resistant temperature-sensitive switch for an electric heating device comprises a power input end terminal, a power output end terminal, a thermometal piece, a movable contact, a static contact, a metal elastic piece, an inner casing, an outer casing and a push rod. The position of the movable contact corresponds to that of the static contact. The push rod is arranged between the thermometal piece and the metal elastic piece, and the thermometal piece is arranged at the bottom of the inner casing and is in direct contact with the electric heating device. One end of the metal elastic piece and the power input end terminal are fixedly connected onto the inner casing, the other end of the metal elastic piece is provided with the movable contact, and the static contact is arranged on the power output end terminal. When the temperature-sensitive switch is installed on the electric heating device and works, the thermometal piece is in direct contact with the electric heating device. When the electric heating device reaches the rated temperature, the thermometal piece is bended upwards to push the push rod to enable the movable contact and the static contact on the end portion of the metal elastic piece to be separated to quickly cut off a circuit and prevent dry burning. Due to the fact that the thermometal piece is in direct contact with the electric heating device, temperature induction is more sensitive, reaction action is quicker, a dry-burning-resistant protection effect is improved, and safety is improved.

Description

The anti-dry temperature-sensitive switch of electroheat equipment
[technical field]
The present invention relates to temperature detect switch (TDS), particularly relate to a kind of anti-dry temperature-sensitive switch of electroheat equipment.
[background technology]
Along with the raising of people's living standard, the household electrical appliance kind is also more and more, electrical equipment generally to use life to people to bring convenient greatly, if but the user lacks Electrical Safety prevents consciousness, it also can bring potential safety hazard to the user, causes security incident.For electroheat equipment, as electric cooker, electric kettle, electric heater etc., electrothermal device is generally contained in its inside, as heat-generating disc, fever tablet etc., if allow electrothermal device work under abnormal operating state always, as anhydrous heating, over temperature and heat etc., be easy to cause damage of product because of dry combustion method, even cause fire to occur.Therefore, for electroheat equipment, it generally need to arrange thermostat and guarantee Electrical Safety.When the electrothermal device working temperature during higher than predetermined temperature, thermostat can automatic shutdown circuit to prevent dry combustion method.Thermostat can prevent that to a certain extent dry-fire condition from occuring, but existing thermostat is not because bimetal leaf contacts with electrothermal device, causes its movement response insensitive, can't be in time open circuit fast, in the course of time, can accelerate the aging of electroheat equipment equally, cause potential safety hazard.
[summary of the invention]
The present invention is intended to address the above problem, but and provide a kind of when temperature reaches rated temperature fast cut-off circuit to prevent dry combustion method, stable performance, the anti-dry temperature-sensitive switch of safe and reliable electroheat equipment.
For achieving the above object, the invention provides a kind of anti-dry temperature-sensitive switch of electroheat equipment, it is characterized in that, this temperature-sensitive switch comprises bimetal leaf, metal clips, moving contact, fixed contact and push rod, described bimetal leaf can vary with temperature and be out of shape, and it contacts with electrothermal device; One end of described metal clips is connected with the power input binding post, and the other end is free end, and this free end is provided with moving contact; Described fixed contact is located at position corresponding with moving contact on the power output end binding post, and described fixed contact contacts and conducting with moving contact when electrothermal device works; One end of described push rod is connected with bimetal leaf, and the other end heads on described metal clips; And when the electrothermal device of electroheat equipment reached design temperature, described bimetal leaf temperature distortion and being bent upwards promoted push rod and moves upward, and made the moving contact and fixed contact disconnection of metal clips end, with circuitry cuts, to prevent the electrothermal device dry combustion method.
Described push rod vertically is located between bimetal leaf and metal clips, and the one end is fixed in the middle part of bimetal leaf, and its other end heads on the middle part of metal clips.
Temperature-sensitive switch of the present invention also is provided with shell and a hollow inner casing that the lower end is uncovered, described casing is located at outside inner casing, form a cavity between the two, described metal clips is located in described cavity, the power input binding post is fixed on inner casing, one end of metal clips is connected with the power input binding post, the power output end binding post is fixed in position corresponding with metal clips on inner casing, described bimetal leaf is located at the inner casing inner bottom part, one end and the bimetal leaf of described push rod are affixed, and its other end passes inner casing and heads on described metal clips.
Described inner shell bottom is provided with opening, and described bimetal leaf contacts with electrothermal device by this opening.
The position corresponding with bimetal leaf at inner shell bottom is provided with metal conducting strip, and described metal conducting strip is provided with through hole, and described bimetal leaf is fixed in a side of metal conducting strip, and contacts with electrothermal device by through hole.
The link of described metal clips and power input binding post is affixed or be welded on inner casing by rivet, described moving contact riveted or be welded in the free end end of metal clips, described fixed contact riveted or be welded on the power output end binding post, described power output end binding post are affixed or be welded on inner casing by rivet.
One end of described power input binding post and power output end binding post is affixed with inner casing respectively, and its other end stretches out and extends to outside shell round about from the bottom opening of shell respectively.
Described power input binding post and power output end binding post are the scalariform sheet metal.
Described inner casing is made by insulating material.
Useful contribution of the present invention is, it provides a kind of anti-dry temperature-sensitive switch of safe and reliable, stable performance.The present invention directly contacts bimetal leaf with electrothermal device, make its temperature sense sensitiveer, and the action of cutting off circuit is rapider, thereby can fast, accurately cut off circuit.The characteristics such as in addition, that the anti-dry temperature-sensitive switch of electroheat equipment of the present invention has is simple in structure, cost of manufacture is low, and stable performance, response are sensitive, safe and reliable, easy to implement.
[description of drawings]
Fig. 1 is structural representation of the present invention.
Fig. 2 is temperature-sensitive switch working state schematic representation of the present invention.
Fig. 3 is operation principle schematic diagram of the present invention.
Fig. 4 is structural upright schematic diagram of the present invention.
[embodiment]
The following example is to further explanation of the present invention and replenishes, the present invention is not constituted any limitation.
The anti-dry temperature-sensitive switch of electroheat equipment of the present invention, applicable to multiple electrothermal device, as heat-generating disc, fever tablet etc., in the present embodiment, electrothermal device is heat-generating disc, it can be known electric heating film for heating dish.As Fig. 1~shown in Figure 4, anti-dry temperature-sensitive switch of the present invention comprises inner casing 80, shell 70, binding post, bimetal leaf 10, push rod 60 and metal clips 20, its groundwork principle is to be heated to drive on push rod 60 by bimetal leaf 10 to move, thereby promote metal clips 20, make moving contact 40 and fixed contact 50 separately cut off circuit, play the purpose of anti-dry.
Specifically, as shown in Figure 1, described shell 70 is the uncovered rectangular housing in lower end, and it is for the protection of each parts of its inside, and guarantees to use safety.Described inner casing 80 is hollow housing, and its top is provided with 3 connecting holes, is respectively used to install rivet 81 and push rod 60, and its bottom is provided with opening, is used for installing bimetal leaf 10, and bimetal leaf 10 is communicated with the external world.Described inner casing 80 is located in shell 70, and its height makes and forms a cavity between inner casing 80 and shell 70 less than the height of shell 70.This cavity is used for installing metal clips 20 and binding post.Described binding post is provided with two altogether: power input binding post 31 and power output end binding post 32.In the present embodiment, described binding post is the stepwise sheet metal, and its profile is similar to The one end is individually fixed in the upside of inner casing 80, form the connecting portion parallel with the upper surface of shell 70, this connecting portion is vertically bending downwards, and stretch out and extend out to outside shell 70 from shell 70 bottoms along the direction parallel with connecting portion, stretch out the outer part of shell 70 and be used for connecting external power cord.The connecting portion of described power input binding post 31 laminates on metal clips 20 ends, and its lap is fixed in the upper end of inner casing 80 by rivet 81, can certainly fix and inner casing 80 upper ends by welding manner.The connecting portion of described power output end binding post 32 is under metal clips 20, and it directly is fixed on inner casing 80 by rivet 81.Be provided with fixed contact 50 in the end of described power output end binding post 32.In the present embodiment, described fixed contact 50 is riveting on power output end binding post 32, can guarantee the stability that connects.In other embodiment, fixed contact 50 also can be fixedly welded on power output end binding post 32.One end and the inner casing 80 of described metal clips 20 are affixed, and its other end is free end, at metal clips 20 free-ended end downside, namely on the position corresponding with fixed contact 50 positions, are provided with moving contact 40.The reliability that connects for improving structure, described moving contact 40 is riveting on metal clips 20.Described moving contact 40 is the conduction tie point with fixed contact 50, and during normality, both contact connection, thus but turning circuit.In the inside of described inner casing 80, be provided with bimetal leaf 10 and push rod 60, described bimetal leaf 10 is located at the bottom of inner casing 80 inside, and parallels with described metal clips 20.Because inner casing 80 bottoms are provided with opening, therefore the lower surface of described bimetal leaf 10 directly protrudes from outside inner casing 80, can directly contact with electrothermal device during installation, thereby improve temperature control.In addition, also metal conducting strip 90 can be set between bimetal leaf 10 and inner casing 80 bottoms (opening), as Fig. 1, shown in Figure 4, be provided with through hole 91 on metal conducting strip 90, described metal conducting strip 90 is fixed in inner casing 80 bottoms, thereby can be by the even conduction heat of metal conducting strip 90, and metal conducting strip 90 is provided with through hole 91, the ledge of bimetal leaf 10 is directly contacted, to improve induction sensitivity with electroheat equipment.Described push rod 60 vertically is located between bimetal leaf 10 and metal clips 20, the one end is fixed in the middle part of bimetal leaf 10, its other end passes the connecting hole at inner casing 80 tops, and be resisted against the downside at metal clips 20 middle parts, make when bimetal leaf 10 temperature reach rated temperature, bimetal leaf 10 is bent upwards and promotes push rod and moves up, thereby jack-up metal clips 20 makes moving contact 40 separate rapidly with fixed contact 50, cut off circuit, prevent dry combustion method.
described inner casing 80 is made by electrical insulator material, during use, the anti-dry temperature-sensitive switch of electroheat equipment of the present invention is installed in electrothermal device, Electric radiant Heating Film one side as heat-generating disc, bimetal leaf 10 is directly contacted with electrothermal device, then binding post is connected with both ends of power respectively, the anti-dry temperature-sensitive switch of electroheat equipment of the present invention is connected in series into circuit, as shown in Figure 2, electric current flows to metal clips 20 by power input binding post 31, then be electrically connected to power output end binding post 32 by the moving contact 40 that is in contact with one another with fixed contact 50, form path.When the electrothermal device excess Temperature, namely dry combustion method appears and when reaching bimetallic rated temperature, as shown in Figure 3, described bimetal leaf 10 is bent upwards, and promotes to move on metal clips 20 by push rod 60, and moving contact 40 is separated rapidly with fixed contact 50, cut off rapidly circuit, prevent dry combustion method.Because bimetal leaf 10 directly contacts with electrothermal device, its temperature sense is sensitiveer, and the reaction action is rapider, more can improve the anti-dry protective effect, and because reaction is swift in motion, more can avoid arcing generation under high electric current, improves security performance.
Although by above embodiment, the present invention is disclosed, protection scope of the present invention is not limited to this, is not departing under the condition of the present invention design, and the distortion that above each member is done, replacement etc. all will fall in claim scope of the present invention.

Claims (9)

1. the anti-dry temperature-sensitive switch of an electroheat equipment, is characterized in that, this temperature-sensitive switch comprises:
The bimetal leaf (10) that can vary with temperature and be out of shape, it contacts with electrothermal device;
Metal clips (20), the one end is connected with power input binding post (31), and the other end is free end, and this free end is provided with moving contact (40);
Fixed contact (50), it is located at the position corresponding with moving contact (40) on power output end binding post (32), and described fixed contact (50) contacts and conducting with moving contact (40) when electrothermal device works;
Push rod (60), the one end is connected with bimetal leaf (10), and the other end heads on described metal clips (20); And
When the electrothermal device of electroheat equipment reaches design temperature, described bimetal leaf (10) temperature distortion and being bent upwards promotes push rod (60) and moves upward, and the moving contact (40) of metal clips (20) end is disconnected with fixed contact (50), with circuitry cuts, to prevent the electrothermal device dry combustion method.
2. the anti-dry temperature-sensitive switch of electroheat equipment as claimed in claim 1, it is characterized in that, described push rod (60) vertically is located between bimetal leaf (10) and metal clips (20), and the one end is fixed in the middle part of bimetal leaf (10), and its other end heads on the middle part of metal clips (20).
3. the anti-dry temperature-sensitive switch of electroheat equipment as claimed in claim 2, it is characterized in that, this temperature-sensitive switch is provided with shell (70) and a hollow inner casing (80) that the lower end is uncovered, described shell (70) is sheathed on outside inner casing (80), form a cavity between the two, described metal clips (20) is located in described cavity, power input binding post (31) is fixed on inner casing (80), one end of metal clips (20) is connected with power input binding post (31), power output end binding post (32) is fixed in the position corresponding with metal clips (20) on inner casing (80), described bimetal leaf (10) is located at inner casing (80) inner bottom part, one end of described push rod (60) and bimetal leaf (10) are affixed, its other end passes inner casing (80) and heads on described metal clips (20).
4. the anti-dry temperature-sensitive switch of electroheat equipment as claimed in claim 3, is characterized in that, described inner casing (80) bottom is provided with opening, and described bimetal leaf (10) contacts with electrothermal device by this opening.
5. the anti-dry temperature-sensitive switch of electroheat equipment as claimed in claim 4, it is characterized in that, be provided with metal conducting strip (90) in the position corresponding with bimetal leaf (10), inner casing (80) bottom, described metal conducting strip (90) is provided with through hole (91), described bimetal leaf (10) is fixed in a side of metal conducting strip (90), and contacts with electrothermal device by through hole (91).
6. the anti-dry temperature-sensitive switch of electroheat equipment as claimed in claim 3, it is characterized in that, the link of described metal clips (20) and power input binding post (31) is affixed or be welded on inner casing (80) by rivet (81), described moving contact (40) riveted or be welded in the free end end of metal clips (20), described fixed contact (50) riveted or be welded on power output end binding post (32), described power output end binding post (32) are affixed or be welded on inner casing (80) by rivet (81).
7. the anti-dry temperature-sensitive switch of electroheat equipment as claimed in claim 6, it is characterized in that, described power input binding post (31) is affixed with inner casing (80) respectively with an end of power output end binding post (32), and its other end stretches out and extends to round about outside shell (70) from the bottom opening of shell (70) respectively.
8. the anti-dry temperature-sensitive switch of electroheat equipment as claimed in claim 7, is characterized in that, described power input binding post (31) is the scalariform sheet metal with power output end binding post (32).
9. as the anti-dry temperature-sensitive switch of arbitrary described electroheat equipment of claim 2~8, it is characterized in that, described inner casing (80) is made by insulating material.
CN2013103017156A 2013-07-15 2013-07-15 Dry-burning-resistant temperature-sensitive switch for electric heating device Pending CN103383903A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013103017156A CN103383903A (en) 2013-07-15 2013-07-15 Dry-burning-resistant temperature-sensitive switch for electric heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013103017156A CN103383903A (en) 2013-07-15 2013-07-15 Dry-burning-resistant temperature-sensitive switch for electric heating device

Publications (1)

Publication Number Publication Date
CN103383903A true CN103383903A (en) 2013-11-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103985598A (en) * 2013-12-24 2014-08-13 东莞市凯恩电子科技有限公司 Two-path output manual outage reset temperature controlled switch
CN104576191A (en) * 2015-02-03 2015-04-29 佛山市川东磁电股份有限公司 Dry-heating preventing temperature sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006099978A (en) * 2004-09-28 2006-04-13 Hosiden Corp Thermoprotector
CN101345159A (en) * 2008-08-20 2009-01-14 朱英年 Temperature controller with temperature control and protection function
CN202917391U (en) * 2011-11-14 2013-05-01 东莞市凯一电子科技有限公司 Temperature protection device
CN203434086U (en) * 2013-07-15 2014-02-12 东莞市凯恩电子科技有限公司 Dry burning prevention temperature sensitive switch for electrothermal equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006099978A (en) * 2004-09-28 2006-04-13 Hosiden Corp Thermoprotector
CN101345159A (en) * 2008-08-20 2009-01-14 朱英年 Temperature controller with temperature control and protection function
CN202917391U (en) * 2011-11-14 2013-05-01 东莞市凯一电子科技有限公司 Temperature protection device
CN203434086U (en) * 2013-07-15 2014-02-12 东莞市凯恩电子科技有限公司 Dry burning prevention temperature sensitive switch for electrothermal equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103985598A (en) * 2013-12-24 2014-08-13 东莞市凯恩电子科技有限公司 Two-path output manual outage reset temperature controlled switch
CN104576191A (en) * 2015-02-03 2015-04-29 佛山市川东磁电股份有限公司 Dry-heating preventing temperature sensor

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Free format text: CORRECT: INVENTOR; FROM: MA YONGHONG ZHENG QUANWEN LU ZIYOU TO: MA YONGHONG ZHENG QUANWEN LU ZICHEN

CB03 Change of inventor or designer information

Inventor after: Ma Yonghong

Inventor after: Zheng Quanwen

Inventor after: Lu Zichen

Inventor before: Ma Yonghong

Inventor before: Zheng Quanwen

Inventor before: Lu Ziyou

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20131106

Assignee: Dongguan City Kai billion electronic technology Co. Ltd.

Assignor: Dongguan KAIN Electronic Science & Technology Co., Ltd.

Contract record no.: 2015990000830

Denomination of invention: Dry-burning-resistant temperature-sensitive switch for electric heating device

License type: Common License

Record date: 20150930

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20131106

Assignee: Jiang Hua Kai Yi Technology Ltd.

Assignor: Dongguan KAIN Electronic Science & Technology Co., Ltd.

Contract record no.: 2015990000911

Denomination of invention: Dry-burning-resistant temperature-sensitive switch for electric heating device

License type: Common License

Record date: 20151105

AD01 Patent right deemed abandoned

Effective date of abandoning: 20161116

C20 Patent right or utility model deemed to be abandoned or is abandoned